Steam ejector for exhausting apparatus.



G. DOD.

STEAM EJECTOR 0R EXHAUSTING APPARATUS.

APPLICATION FILED Nov. 30. 1915.

Patented Apr. 25,1916.

4 SHEETS-SHEET 1.

G. DOD.

' STEAM EJECTOR 0R EXHAUSTING APPARATUS. APPLlCATION FILED NOV: 30. 1915.

1 9 1 1 M67 u Patented Apr. 25, 1916.

4 SHEETS-SHEET 2- THE COLUMBIA PLANOGRAPH 60-. WASHINGTON, D. c.

G. DOD.

STEAM EJECTOR 0R EXHAUSTING APPARATUS.

APPLICATION FILED NOV. 30. 1915.

' 1,1 81 @670 Patented Apr. 25, 1916.

4 SHEETS-SHEET 3.

J72 yen Z02- THE COLUMBIA PLANOGRAPH c0., WASHINGTON, n. c.

G. on. STEAM EJECTOR 0R EXHAUSTING APPARATUS. APPLICATION FILED NOV. 30, 1915.

Patented Apr. 25,1916.

4 SHEETS-SHEET 4. We .4.

GERALD DOD, F SOUTI-IPORT, ENGLAND.

STEAM EJ'ECTOB- OR EXHAUSTING- APPARATUS.

Specification of Letters Patent.

Patented Apr. 25, 1916..

Application filed November 30, 1915. Serial No. 64,373.

To all whom 2'25 may concern.

Be it known that I, GERALD Don, a subject of the King of England, and resident of Southport, in the county of Lancaster, Eng- ;3 land, have invented new and useful Improvements Connected with Steam Ejectors or Exhausting Apparatus, of which the following is a specification.

This invention has reference to the removal of, and dealing with dust or dirt, or granular matter, from fines of steam generator and other furnaces, and from other analogous chambers; and more particularly to that system wherein the dust and dirt or like matters, are moved by a vacuum created within a vessel by a steam ejector, and the matters so collected are subsequently discharged from the vessel or container in which they have been collected; and this invention has primarily for its object, to provide means or modes of operation hereinafter described, by which the action of the apparatus is rendered more efficient and silent, and the construction of the apparatus or modes of operating are generally simolified and improved.

According to this invention, a receiver or vessel or vessels is or are provided in the dust or dirt removing apparatus-4n addition to the main dust depositing vessel-into which the steam jet exhausting apparatus discharges; and back pressure in this receiver or vessel into which the steam, air,

and some dust or dirt are discharged and expanded, is avoided by condensing the steam entering the receiver or vessel with the air, by introducing a stream or jets of water into the receiver or vessel at or near the point of delivery of the air and steam into it, into contact with or through which water, the air and steam mixed with it pass; and in coming in contact with the water, the steam is condensed, the result of which is that back pressure, which would otherwise exist in the receiver or vessel, is obviated, and therefore the efliciency of the ejector or ejectors is maintained at a high degree. ,.lso,on the outlet pipe or branch in the vessel into which. the exhaustors discharge, there is provided a silencing device consisting of a perforated pipe or rose, by which the creation of the noise by the exhauster is obviated. The dust which passes through the ejectors with the steam and air forms only a small por tion of the total dust moved; the bulk being collected and deposited in the main receiver or vessel.

The above improvements willbe further described in connection with the accompanying drawings which illustrate them.

In these drawings Figure 1 is an elevation of the complete plant for the removal of and dealing with dust, or dirt, or granulated matter of the kind herein referred to; and Fig. 2 is a side elevation; Fig. 3 shows a modification, and Fig. 4 is a section showing in detail the means employed for obviating the noise created by the steam exhausters, and preventing or obviating back pressure in the vessels or chambers into which the steam and air are discharged.

Referring to the drawings, 1 represents generally'the vessel into which the dust or dirt or matter carried by the air is introduced, and wherein it separates out from the air; 2 is the conduit through which the air and dust or dirt is conveyed from the place of deposit of the dust, say for example a furnace flue, to the vessel 1; 3 are the steam jet ejectors-of which there are twoconnected with the upper part of the vessel 1 for creating vacuum within the vessel; l is the pipe for supplying the ejectors with steam; 5 is the steam supply regulating valve, which may be assumed to be operated by a device within the vessel 1 which is actuated by the presence of dust in the vessel 1 upon its being deposited therein. such device being connected with the valve 5 by the rod 6 in the known way.

7 are-vessels into which the discharge of air, steam, and a small quantity of dust delivered from the steam jet e'xhausters takes place; and 8 is the final air discharge pipe.

9 is the dust discharge door in the vessel 1 9" is its operating rod; and 10 a weighted lever, fulcrumed at 11, connected with the rod 9 which opens the door when released.

12 is a vessel surrounding the discharge door 9, and discharge mouth of the vessel 1, into which the contents of the vessel 1 are discharged. The vessel 12 has a conical and diminishing discharge or lower part 13; and it is provided with an aperture 14, which is normally closed by a cover opposite the door 9, so as to obtain access to it if required. The vessel 12 keeps the dust or dirt from coming into contact with air in discharging from the discharging door 9.. and from. flying about, and acts as a gem lli P p I v The bottom of each vessel 7' is coned at 18, so: ZLSntO carryoif the liquid; which is eral quie ting chamber, m tts; discharging;

dust.

With regard to the means for obviating the noise created by the steam ejection, this comprises an expanding conedevice 16 surrounding the discharge nozzle "of the ejector3, as hereafter described with reference toFig'. 4:; anddepending down into the vessel 7 as shown, the lower part of the device,

being cylindrical; and a perforated pipe or rose't17, also. depending-a; short: distance down into the vessel 7, and on theiupper P2LI?l?"OZfifSfl11Zl1B-:- This perforated rose .orpipe lTjIfOI IllSil'lQ lower end of the air discharge. i e 8.

discharged into the cone 16, as vhereinafter described,- and' the dust: caught by.- it; and thiswliquid is carried-v by the. pipe 19 fromthe: condesing and silencing vessels 79111130 the tank 20 having asvalive 21 on it, whicln is controlled; as hereinafter. described 1 for theigpurpose specified; I

Referring now more particularly to Fig. 4, thisffigurelshowsthemode ofintr-oducing the1.water to the: ejector apparatus, and the discharge cone devices 16, for-condensing the ej ector: steam, an'd preventing back pres-- sure. The water -forcondensing-the steam is introduced by way off-1 an annular port 22in and extending around the outer casing controlling the quantity of 'water By thisarrangement, frorn the lip of-the discharge ejectorcone 24 th'ere'flows aring-spray oijj stream of water andthe steam-issuinginto the space 'within this ring of water comes into Contact with it and condenses, and so preventsthe existence of material back pressure, in the vessel 7, which would-if it; existed: interfere with the free discharge of the air fronithe ejectors, and in consequence their "efiiciencyand their creating powers,

\Vhen dust or like removing apparatus of the kind; referred to is'arran'ged' to discharge into a cart, 'truck, orthe like, which is to;c0nv'ey it away, the condensing water, aird jthe water of condensation, areadapted automatically I to deposit any fine dust which may arise from the bulk discharging from the {vessel 12, orit might be by the door 9, if no vessel as;12-were-used, Thiswater, asfstated, in the case shown, is collected in the-tank-'20,' and; is conducted by the pipe 32 to-the-lrose or other-sprayer33'in, around, or adjacent to the dischargeend' or mouth of th'e vessel 12, and so arrangedthat the downward spray falls on any rising dust from the body of dust being discharged, and-so moistens it and settles it. This spraying is arranged and adapted to take place when'the' door 9 is opened; and the opening of this [door is controlled or efiected by a piston in the cylinder 30, one end of which connected-- by a pipe 31 with the steam pipe 4:, so that when steam is supplied to this pipe 4: by the openingof the valve '5, and so to the-ejeotorsfE-B, it is-ialso supplied to thettop. of tliecylinder 30, and-presses the piston of it down; and the piston being connected to the door operating weighted lever- 10, bythe. double. links 34:, it moves it-against this lever, about the fulcrum 11, and so keeps it closed; and while so closed, the valve 21,- which is'on the pipeBP), and which is also connectedwith the links 34:, is also. closed,-beingpressed down onto its seat. On-the' other hand, when-the steam is cut off from the ejectorexhausters: 3, and the pressure in. the cylinder is relieved, the weight ofz the lever 10 will simultaneously open the discharge'doo1 9, and the water valve- 21, and-allow the water from the tank 20, toflow to the spraying rose33'.

Insome cases, the discharge door 9- of: the vessel 1: is, automatically operated or I controlled-by the water: fromthe condensing or silencing vessel or chamber 7 -'-or by water otherwise supplied; and" one mode of accomplishingthi's is illustrated in- Fig. 3. Namely, in-this case,withinthetankQO, to which the water is supplied, there -is employed a floater device 35-,- say a cup floater, connected to the'le'ver 36, which operates the steam supply to the-e -hauster ejectors; and when the Waterrisesin the tanlr 20, the floater 35 also rises lifting the lever 36' aboutits fulcrum 36 This continues until the valve comes on to its seat and closes,

and whenclosed-the vacuum is destroyed. When the vacuumis on-the dust discharge door ofth'e mainvessel-spindle 9 of which is seen in Fig E2:will be held up to its seat by theexternal pressure of the'atmosphere; but when oif,the discharge'door opens by its own weight, or is assisted by a weight. Should, however, the doorsticlc when the pressure isremoved, the float-35 will continue to rise until a pin'38 in the double links 34through the space between which the door lever 10passes-acts on this lever, and so forces the door open; whereupon the lever-10,being free to rise at this end, does so, and the door falls; at the same time the lever 10 and links 10* open the valve 21 and allow the water from the tank 20 to pass to the spraying rose 33L When the door is open, the lever 10'comes on to another pin 39 extendingthrough' links M. The level'of the water inv the tank 20 then drops, and the float 35 falls with it, slowly, so bringing down the lever 36, which is arranged to open the valve and admit steam to the ejectors 8. In the falling of the lever 36, the pin 39 being in contact with the upper edge of the lever 10 causes the door end of the lever 10 to rise slowly, and so slowly closes the door; while at the same time, at the end .of the stroke, the valve 21 is again closed;

and the water again passes into the tank 20, and again rises in it, and the operation described is repeated.

Instead of the float device, in an open tank, being used, as described, a tipping basin, or other similar hydraulic actuating device, into which the liquid falls from the vessel 7, or other timed or measured source of supply, may be employed.

ll hen the operation of this dust collecting and discharging apparatus is operated or controlled by the mode described with reference to Fig. 3, the use of a device within the dust vessel which, through the presence of the dust therein, causes the actuation of the ejector steam supply control valve, is rendered unnecessary, the apparatus itself being worked by the liquid supplied to the hydraulic appliance, which upon a given quantity being supplied, over a given period, cuts off the steam supply to the ejector, and so causes the door to open; so that the dust or dirt or the like collects over a given period of time, and then discharges automatically.

W hat is claimed is 1. Apparatus for removing dust, dirt and granular matter from fines of steam generators, furnaces and other chambers, comprising a collecting vessel; a steam ejector for creating a vacuum within the collecting vessel; water supply means for condensing the steam discharged from the ejector; and means for subsequently applying and using the condensing water for preventing the ris ing of dust from the volume or body there of when being discharged from the apparatus; substantially as described.

In an apparatus of the class described, the combination. of main and auxiliary vessels, a door at the discharge end of the main vessel, means for supplying water to the auxiliary vesse a tank receiving the water discharged from the auxiliary vessel, a dis charge pipe leading from the tank to the main vessel, a valve in the discharge pipe, a weighted lever connected to the door, a connection between the weighted lever and the valve, whereby the latter and the door are simultaneously operated, and means for controlling the valve and the door.

In an apparatus of the class described, the combination with a main collecting vessel, a door at the discharge end of the main collecting vessel, an auxiliary collecting vessel. a pipe between the main and auxiliary vessels. an ejector in the pipe, means ineluding a valve for supplying the ejector with steam, means for supplying the exit of the pipe in the auxiliary vessel with water, a tank for receiving the water discharged from the auxiliary vessel, a discharge leading from the tank to spray the dirt discharged from the main receiving vessel, a valve in the discharge pipe, means between the door and the valve in the discharge pipe for simultaneously operating same, and a connection from the last mentioned means to the steam valve for operating the latter to stop the ejector when the door is opened. 4. In an apparatus of the class described, the combination of a main receiving vessel, a door at the discharge end thereof, an auxiliary vessel, an ejector between the main and auxiliary vessels for forming a vacuum in the main receiving vessel and injecting steam in the auxiliary vessel. means for supplying water to condense the steam and settle the dust in the auxiliary chamber, a tank into which the water from the auxiliary chamber discharges, a pipe leading from the tank and discharging the water to the path of the dirt discharged from the main receiving chamber, and automatic means controlled by the water in the tank for controlling the ejector, the door, and the valve.

5. Apparatus for removing dust, dirt and granular matter from the fines of steam generators, furnaces and other chambers; comprising in combination a collecting chamber, a steam ejector; a vessel into which the ejector discharges; a water jet steam condensing means in the said vessel; a water tank adapted to receive the water from the vessel; a discharge door to the collecting chamber: and a water regulating valve connected with the discharge door and operating in connection with it.

6. Apparatus for moving dust, dirt or granular material from lines of steam generators, furnaces and other chambers, com prising a main vessel having a discharging part. a door therefor, an auxiliary vessel connected with the main vessel, means for creating a partial vacuum in the main vessel and discharging into the auxiliary vessel, means for supplying water to the auxiliary vessel. a secondary vessel into and through which the dust or dirt from the main vessel is discharged, and means actuated by the water from the auxiliary vessel for operating the door and simultaneously supplying water to the discharge end of the secondary receiving vessel to prevent the rising of dust from the body of dust being discharged.

7. iipparatus for granular matter from .tlues of steam generators. furnaces. and other chambers, comprising a dust and dirt collecting vessel having a discharging door or device; a vessel inclosing the said discharging door or device moving dust, dirt or adapted to receive the dust and dirt when discharged; a' steam ejector; water supply means for condensing thesteam of the steam ejector; meansfor collecting the Water after the condensing action;v and means for sub sequently applying such Water to the settling of thedust, dirt or granular matter discharged from the collecting vessel.

8. An. apparatus "for removing flue dust and the like including a main receiving vessel, a steam' ejector having its vacuum end connected thereto, a secondary receiving vessel, a valve for-controlling the supply of steam tothe ejector, a at: the discharge end of the ejector, said sprayrdiScharging into the secondary recei-ving'vessel, a discharge door at the lower end of the main receiving vessel, an auxiliary vessel located at'the lowerend of the main vessel and into which the door is designed to open, a tank for receiving accumulated water from the secondary receivingzvessel, a discharge pipe leading from said": tank and into the. auxiliary vessel, avalve; in the discharge pipe, said valve being Copies oi this patent may be obtainedifor water spray located five cents adapted tobe controlled by the door operating means.

9. In an apparatus of the class described,- the combination of a main receiving vessel, a steam ejector having its vacuum end connected thereto, an auxiliary receiving vessel, a water spray located at the discharge end of the ejector. said spray discharging into the auxiliary receiving vessel, a discharge door at the lower end of the main receiving vessel. a tank for receiving accumulated Water from the auxiliary receiving vessel, adischarge pipe provided with a valve leading from said. tank to deliver a spray to the dirt discharged when the door is opened, and means. for simultaneously opening and closing the door and valve.

In testimony whereof I have signed my name to thisspecification in the presence of two subscribing Witnesses.

GERALD DOD.

lVitnesses SOMERVILLE GoooALL, F nn) .OsBoRNn.

each, by addressingthe. Commissioner of Patents,

Washingtoml); c.' 

